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ipmon(8)                    System Manager's Manual                   ipmon(8)



NAME
       ipmon - monitors /dev/ipl for logged packets

SYNOPSIS
       ipmon  [ -abDFhnpstvxX ] [ -N <&lt;device>&gt; ] [ -o [NSI] ] [ -O [NSI] ] [ -P
       <&lt;pidfile>&gt; ] [ -S <&lt;device>&gt; ] [ -f <&lt;device>&gt; ] [ <&lt;filename>&gt; ]

DESCRIPTION
       ipmon opens /dev/ipl for reading and awaits data to be saved  from  the
       packet  filter.   The  binary data read from the device is reprinted in
       human readable for, however, IP#'s are not mapped  back  to  hostnames,
       nor  are  ports mapped back to service names.  The output goes to stan-
       dard output by default or a filename, if given  on  the  command  line.
       Should  the  -s  option  be used, output is instead sent to syslogd(8).
       Messages sent via syslog have the day, month and year removed from  the
       message, but the time (including microseconds), as recorded in the log,
       is still included.

       Messages generated by ipmon consist  of  whitespace  separated  fields.
       Fields common to all messages are:

       1.  The  date of packet receipt. This is suppressed when the message is
       sent to syslog.

       2. The time of packet receipt. This is  in  the  form  HH:MM:SS.F,  for
       hours, minutes seconds, and fractions of a second (which can be several
       digits long).

       3. The name of the interface the packet was processed on, e.g., we1.

       4. The group and rule number of the rule, e.g.,  @0:17.  These  can  be
       viewed with ipfstat -n.

       5.  The action: p for passed, b for blocked,  for a short packet, n did
       not match any rules or L for a log rule.

       6. The addresses.  This is actually three fields:  the  source  address
       and  port  (separated  by  a comma), the ->&gt; symbol, and the destination
       address and port. E.g.: 209.53.17.22,80 ->&gt; 198.73.220.17,1722.

       7. PR followed by the protocol name or number, e.g., PR tcp.

       8. len followed by the header length and total length  of  the  packet,
       e.g., len 20 40.

       If the packet is a TCP packet, there will be an additional field start-
       ing with a hyphen followed by letters corresponding to any  flags  that
       were set.  See the ipf.conf manual page for a list of letters and their
       flags.

       If the packet is an ICMP packet, there will be two fields at  the  end,
       the  first always being `icmp', and the next being the ICMP message and
       submessage type, separated by a  slash,  e.g.,  icmp  3/3  for  a  port
       unreachable message.

       In  order  for  ipmon  to properly work, the kernel option IPFILTER_LOG
       must be turned on in your  kernel.   Please  see  options(4)  for  more
       details.

OPTIONS
       -a     Open  all  of  the device logfiles for reading log entries from.
              All entries are displayed to the same output 'device' (stderr or
              syslog).

       -b     For  rules  which  log the body of a packet, generate hex output
              representing the packet contents after the headers.

       -D     Cause ipmon to turn itself into a daemon.   Using  subshells  or
              backgrounding of ipmon is not required to turn it into an orphan
              so it can run indefinitely.

       -f <&lt;device>&gt;
              specify an alternative device/file from which to  read  the  log
              information for normal IP Filter log records.

       -F     Flush  the  current  packet  log  buffer.   The  number of bytes
              flushed is displayed, even should the result be zero.

       -n     IP addresses and port numbers will be  mapped,  where  possible,
              back into hostnames and service names.

       -N <&lt;device>&gt;
              Set the logfile to be opened for reading NAT log records from to
              <device>.

       -o     Specify which log files to actually read data  from.   N  -  NAT
              logfile,  S  - State logfile, I - normal IP Filter logfile.  The
              -a option is equivalent to using -o NSI.

       -O     Specify which log files you do not wish to read from.   This  is
              most sensibly used with the -a.  Letters available as parameters
              to this are the same as for -o.

       -p     Cause the port number in log messages to always be printed as  a
              number  and  never  attempt to look it up as from /etc/services,
              etc.

       -P <&lt;pidfile>&gt;
              Write the pid of the ipmon process to a file.  By  default  this
              is  //etc/opt/ipf/ipmon.pid (Solaris), /var/run/ipmon.pid (44BSD
              or later) or /etc/ipmon.pid for all others.

       -s     Packet information read in will be sent through  syslogd  rather
              than  saved  to  a file.  The default facility when compiled and
              installed is local0.  The following levels are used:

              LOG_INFO - packets logged using the "log" keyword as the  action
              rather than pass or block.

              LOG_NOTICE - packets logged which are also passed

              LOG_WARNING - packets logged which are also blocked

              LOG_ERR  -  packets which have been logged and which can be con-
              sidered "short".

       -S <&lt;device>&gt;
              Set the logfile to be opened for reading state log records  from
              to <device>.

       -t     read the input file/device in a manner akin to tail(1).

       -v     show tcp window, ack and sequence fields.

       -x     show the packet data in hex.

       -X     show the log header record data in hex.

DIAGNOSTICS
       ipmon expects data that it reads to be consistent with how it should be
       saved and will abort if it fails an assertion which detects an  anomaly
       in the recorded data.

FILES
       /dev/ipl
       /dev/ipnat
       /dev/ipstate
       /etc/services

SEE ALSO
       ipl(4), ipf(8), ipfstat(8), ipnat(8)

BUGS
       If you find any, please send email to me at darrenrATpobox.com



                                                                      ipmon(8)